Hi CAG. Here is my referral link for raise.com
They are regularly the cheapest and safest place to buy PSN/Xbox/Eshop currency. I, and many other CAGs have purchased from them without any issues. Gift cards are delivered electronically so you can use the codes right away.
If you sign up through a referral link you also get $5 Raise cash to put towards your next purchase.
Here is the best promo code for new customers:
10RAISE40AF - $10 off a purchase of $40 of more.
This may or may not be combinable with the $5 referral cash. Even if it isn't, you will still have $5 to put towards your next purchase.
I currently maintain the Raise.com promo code thread over in the main forum. Check it out if you have any questions. You can also find more promo codes, info, and tips for using raise.